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The β-oxidation pathway is downregulated during diapause termination in Calanus copepods

The β-oxidation pathway is downregulated during diapause termination in Calanus copepods

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Tidsskriftspublikasjon
Sammendrag
Calanus copepods are keystone species in marine ecosystems, mainly due to their high lipid content, which is a nutritious food source for e.g. juvenile fish. Accumulated lipids are catabolized to meet energy requirements during dormancy (diapause), which occurs during the last copepodite stage (C5). The current knowledge of lipid degradation pathways during diapause termination is limited. We characterized changes in lipid fullness and generated transcriptional profiles in C5s during termination of diapause and progression towards adulthood. Lipid fullness of C5s declined linearly during developmental progression, but more β-oxidation genes were upregulated in early C5s compared to late C5s and adults. We identified four possible master regulators of energy metabolism, which all were generally upregulated in early C5s, compared to late C5s and adults. We discovered that one of two enzymes in the carnitine shuttle is absent from the calanoid copepod lineage. Based on the geographical location of the sampling site, the field-samples were initially presumed to consist of C. finmarchicus. However, the identification of C. glacialis in some samples underlines the need for performing molecular analyses to reliably identify Calanus species. Our findings contributes to a better understanding of molecular events occurring during diapause and diapause termination in calanoid copepods.
Språk
Engelsk
Forfatter(e)
  • Skottene Elise
  • Tarrant Ann M.
  • Olsen Anders Johny
  • Altin Dag
  • Østensen Mari-Ann
  • Hansen Bjørn Henrik
  • Choquet Marvin
  • Jenssen Bjørn Munro
  • Olsen Rolf Erik
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • Woods Hole Oceanographic Institution
  • Diverse norske bedrifter og organisasjoner
  • SINTEF Ocean / Miljø og nye ressurser
  • Nord universitet
År
2019
Publisert i
Scientific Reports
ISSN
2045-2322
Årgang
9
Hefte nr.
1